On the Subject of Not The Bulb
Zero. That's the bomb defuser's job. ;)
This module has two buttons labelled I and O and a see-through light bulb.
The glass is one of six colours: Red, Green, Blue, Yellow, Purple, or White and the screw cap is one of five materials: Copper, Silver, Gold, Blue plastic, or Carbon fibre.
If the screw cap is Ceramic, the module is The Bulb.
Selecting the bulb before either of the buttons will cause it to flash a sequence in Tap Code, with K = (6, 1). Do not interact with the module while it is transmitting.
Decoding the sequence reveals one of the nine letter words in Table A that has been encrypted by the following process:
- Shifting the word 0-8 letters to the left.
- Caesar shifting each letter 0-25 letters forwards.
Find the word in Table A that starts with the first letter of the encrypted word and apply the same encryption process that was used to generate the transmitted sequence to it. This yields the module's keycode.
Use Table B with each letter of the keycode and the colour of the glass to obtain a sequence of four button presses to be submitted into the module.
Selecting the bulb will submit the last four button presses in order.
If the submission is correct, the bulb will flash and a sound may be heard. This sound only plays once, so be vigilant. The bulb may not produce a sound, in which case no modifications are applied.
Otherwise, use Table C with the sound that plays and material of the screw cap to obtain a modification.
Apply the modification to the remaining unsubmitted letters of the keycode before submitting the next sequence of button presses.
If the submission is incorrect, the bulb will not flash, a strike is incurred, and module will reset its submissions, starting over from the first letter of the keycode and allowing the bulb to be selected to restart the transmission.
The module is solved once all nine sequences of presses have been correctly submitted.